| 摘要 |
PURPOSE:To injection mold a thick walled product without the generation of sink marks in a short molding cycle. CONSTITUTION:A cavity unit 1 is constituted by molds 2 and 3 and a clamping component 6 for clamping the mold opening sections of molds 2 and 3. The cavity unit 1 is set in a molding machine, and molten resin is injected in the state of being mold clamped by the molding machine. After that, the cavity unit 1 is released from the molding machine in the state that the clamping component 6 is clamped, and the resin is cooled and solidified. The mold is deflected by the expansion force of the resin in a cavity 4, and as the resin is solidified while compensating the shrinkage of resin following cooling by means of elastic recovery force of the mold, sink marks can be controlled, and as injection is carried out by setting another cavity unit after releasing the cavity unit 1, the molding cycle can be shortened. |
